Virginia Stormwater Management Program (VSMP) regulation requires use of the Virginia Runoff Reduction Method (VRRM) or another equivalent methodology approved by the State Water Control Board for water quality compliance with Part II B (9VAC25-870-65).
- Guidance Memo No. 16-2001 — Updated Virginia Runoff Reduction Method Compliance Spreadsheets – Version 3.0
- Includes “Attachment 1: Virginia Runoff Reduction Method Compliance Spreadsheet User’s Guide & Documentation (Version 3.0, April 2016)” – The guide provides stepwise user instructions as well as a thorough explanation of the spreadsheet logic, equations, and reference information. Also available on the DEQ website.
- VRRM New Development Spreadsheet — Version 3.0 (August 2017)
- VRRM ReDevelopment Spreadsheet — Version 3.0 (August 2017)
Contact Robert Cooper with the DEQ Office of Stormwater Management at 804-698-4033 or Robert.Cooper@deq.virginia.gov if you have questions.